@teachfloor/extension-kit/dist/utils/keyEnvelope.js

Teachfloor Extension Kit

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.unpackKey = exports.packKey = void 0;
const PREFIX = 'ek:'; // encoded key
const VERSION = 1;
const toB64Url = str => {
  // encode UTF-8 to base64
  const base64 = btoa(unescape(encodeURIComponent(str)));
  // make URL-safe
  return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
};
const fromB64Url = str => {
  // restore to normal base64
  const base64 = str.replace(/-/g, '+').replace(/_/g, '/');
  // decode base64 back to UTF-8
  return decodeURIComponent(escape(atob(base64)));
};
const packKey = function (key) {
  let params = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  const payload = {
    v: VERSION,
    k: key,
    p: params
  };
  return PREFIX + toB64Url(JSON.stringify(payload));
};
exports.packKey = packKey;
const unpackKey = enveloped => {
  if (!enveloped.startsWith(PREFIX)) {
    return {
      key: enveloped,
      params: {}
    };
  }
  const json = fromB64Url(enveloped.slice(PREFIX.length));
  const obj = JSON.parse(json);
  if (obj?.v !== VERSION || typeof obj.k !== 'string') {
    throw new Error('Invalid key envelope');
  }
  return {
    key: obj.k,
    params: obj.p ?? {}
  };
};
exports.unpackKey = unpackKey;